Update production_planning_tool.py
[report] customer account head
[report] customer account head
Merge pull request #417 from saurabh6790/master

Customer Account Head Report
Merge branch 'master' of https://github.com/webnotes/erpnext
customer account head report link added in accounts home page
Merge branch 'master' of github.com:webnotes/erpnext
Merge branch 'master' of https://github.com/webnotes/erpnext